What is the Difference Between a Virus, Trojan Horse and Worm?

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What is the Difference Between a Virus, Trojan Horse and Worm?

Written by Hemanshu Patel

Tuesday, 06 November 2007

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What is the Difference Between a Virus, Trojan Horse and Worm?
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Combating Viruses, Worms and Trojan Horses :

The first steps to protect your computer are to ensure your operating system (OS) is up-to-date. This is essential if you are running a Microsoft Windows OS. Secondly, you should have anti-virus software installed on your system and download updates frequently to ensure your software has the latest fixes for new viruses, worms, and Trojan Horses. Additionally you want to make sure your anti-virus program has the ability to scan e-mail and files as they are downloaded from the Internet. This will help prevent malicious programs from even reaching your computer. If this isn't enough protection, then you may want to consider installing a firewall as well.

A firewall is a system which prevents unauthorized use and access to your computer. A firewall can be either hardware or software. Hardware firewalls provide a strong degree of protection from most forms of attack coming from the outside world and can be purchased as a stand-alone product or in broadband routers. Unfortunately, when battling viruses, worms and Trojans, a hardware firewall may be less effective than a software firewall, as it could possibly ignore embedded worms in out going e-mails and see this as regular network traffic. For individual home users, the most popular firewall choice is a software firewall. A good software firewall will protect your computer from outside attempts to control or gain access your computer, and usually provides additional protection against the most common Trojan programs or e-mail worms. The downside to software firewalls is that they will only protect the computer they are installed on, not a network.

It is important to remember that on its own a firewall is unable to get rid of your computer virus problems, but when used in conjunction with regular operating system updates and a good anti-virus scanning software, it will add some extra security and protection for your computer or network.